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Crimp


Cutthroat Cody

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Would a tight crimp (on

Quote

When you have to shoot shoot, don't talk.......

a .125 round in a .38 case with 3.3 of titegroup with Match Grade Primers), cause a squib?

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Tight crimp is good insurance AGAINST a squib, by raising combustion chamber pressures some.  Squibs usually come from a failure to drop the weight of powder you think you are dropping, perhaps due to an operator mistake, a clump or foreign object in the powder, letting powder in measure get low, using contaminated powder, primer or case, and a ton of other reasons.  Don't blame a tight crimp - that is not what your problem was.

 

good luck, GJ

 

"When you have to shoot - make sure you made good ammo!"

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10 hours ago, Cutthroat Cody said:

Would a tight crimp (on

a .125 round in a .38 case with 3.3 of titegroup with Match Grade Primers), cause a squib?

No it would not cause a squib, no powder would though!

I use 3.6 grs Titegroup with a 125 gr bullet.

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My powder drop will is not reliable with Tight Group loads below 3.5 grains. 

Some measures will handle down to about 2.6 just fine, just none that I own.

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I gotta disagree with all the fine folks above... first, that'd be a heck of crimp from a .38 case to a .125 bullet... Which as soon as it cleared the case mouth would likely stop cold!  You'd end up with a might "whoosh" out the muzzle and a bullet left laying on the bore... but no worries, just tilt the muzzle down, it'll slide out easily!  Not in the least, indicative of your typical "squib".   I'm fairly certain that you meant a 125 grain bullet, indicating a weight, as I suspect the folks above assumed...  But, in response to your highlited reference, a tight crimp is very unlikely to cause a squid.  

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I have seen cases of no movement of the bullet, and slug stuck in forcing cone, and slug stuck in barrel.    If I shoot long enough, expect to see a bullet stuck in the throat of a cylinder but clear of the case (a short bullet for sure).

 

Depends upon where the first spot tight enough to stop the motion of the slug occurs. 

 

Pretty common for a no-powder cartridge with a tight crimp to hold the slug right in the case, but not always.  So much can vary with strengths of the metals and sizes of slug and chamber, throat, and barrel areas in the gun.

 

good luck, GJ

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1 hour ago, Griff said:

But, in response to your highlited reference, a tight crimp is very unlikely to cause a squid.  

 

Well, OK, so no calamari tonight.  My conclusion is that the hypothetical situation with a sub-caliber bullet would not cause a squib, either. 

:lol:  GJ

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23 minutes ago, Garrison Joe, SASS #60708 said:

I have seen cases of no movement of the bullet, and slug stuck in forcing cone, and slug stuck in barrel.    If I shoot long enough, expect to see a bullet stuck in the throat of a cylinder but clear of the case (a short bullet for sure).

 

Depends upon where the first spot tight enough to stop the motion of the slug occurs. 

 

Pretty common for a no-powder cartridge with a tight crimp to hold the slug right in the case, but not always.  So much can vary with strengths of the metals and sizes of slug and chamber, throat, and barrel areas in the gun.

 

good luck, GJ

A Pard had one this weekend that stopped half way between the cylinder and barrel. Locked it up right smartly.

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1 minute ago, Eyesa Horg said:

A Pard had one this weekend that stopped half way between the cylinder and barrel. Locked it up right smartly.

 

That one falls in the category:

"slug stuck in forcing cone"

 

good luck, GJ

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